Molecular Characterization of Giardia intestinalis Detected in Humans and Water Samples in Egypt.,Acta Parasitologica

当前位置： X-MOL 学术 › Acta Parasitol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Molecular Characterization of Giardia intestinalis Detected in Humans and Water Samples in Egypt.
Acta Parasitologica ( IF 1.2 ) Pub Date : 2020-03-02 , DOI: 10.2478/s11686-020-00176-4
Naglaa Fathi Abd El-Latif ₁ , Hend Aly El-Taweel ₁ , Ahmed Gaballah ₂ , Aziza Ibrahim Salem ₁ , Ahmed Hamdi Mohamed Abd El-Malek ₃

Affiliation

Background

Giardia intestinalis is a common cause of gastrointestinal illness especially in children of developing countries. Giardia assemblages A and B are the major human infective genotypes.

Objective

The present study aimed to investigate the role of water supply in the epidemiology of giardiasis via genotyping G. intestinalis detected in diarrheic children and in water samples in Egyptian rural areas.

Methods

Stool samples of 100 diarrheic children, 40 drinking water samples and 10 raw water samples of canals were examined microscopically for Giardia. DNA was extracted from microscopically positive faecal samples and from all of the collected water samples. Amplification of Giardia tpi gene was performed by a nested PCR using assemblage A- and assemblage B-specific primers. Giardia gdh gene was amplified by a heminested PCR. Giardia genotypes were determined by restriction fragment polymorphism (RFLP) analysis of the amplified products. Sequencing of the amplified products was performed in two faecal and two water samples

Results

Giardia intestinalis was detected in 24 children, in none of the drinking water samples and in all canal water samples. Giardia sub-assemblage AII was identified in all stool and raw water samples. The RFLP pattern was confirmed in sequenced samples.

Conclusion

The presence of the same Giardia sub-assemblage in diarrheic children and in raw water samples shows by molecular evidence the potential for waterborne dissemination of Giardia in Egypt. Further studies are needed to monitor cyst levels and infectivity of the genotype detected in water for risk assessment and management.

更新日期：2020-03-02

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11